Hi!
That one linked is a 20 page supplement ref 86390 which I've already downloaded and it's no use to me without the main manual ref 86379 it refers straight back to on it's cover!
There's another GR–AX280 BE/GR–AX285EG Service Manual. No 86450 I've also downloaded but that one is useless to me as it only covers plastics, etc., again referring me straight back to manual 86379 I'm still trying to find!
Chris Williams